LAPD Officer Mike Lopez said he could not identify the alleged target of any threats. The investigation stems from a report police received from the alleged victim on March 31, Lopez said. Officers have served a search warrant in connection with the investigation, he said.

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FOR THE RECORD

April 6, 2:13 p.m.: A previous version of this story reported that investigators had visited Sheen at his home. They did not.

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According to law enforcement sources, the investigation involves Sheen's former fiancee, Scottine Ross, who allegedly told police that the former "Two and a Half Men" star threatened her with violence.